Vertical heating furnace



Jun 1 ,-1-926. 5 v 1 535 599 E. BOHLER VERTICAL HEATING FURNACE Filed March 19 2 /1 ler' IIIVEN Tm Patented June- 1, 1926.-

, UNITED, STATES- v 1,586,599 PATENT-I OFFICE.

'EB'NS'I BOHLER, O1 ROSSELANGE, FRANCE.

, VERTICAL HEATING Application ma latch 1a, 1923, Serial No. 826,223, and in Germany March 20, 1922.

This invention relates to a vertical heating furnace for rolled half-products such as blooms and billets and similar metal pieces, in which an improved'distribution of heat received from the combustion at the burners or other heat source is caused to more thoroughly envelop the articles being heated, while the articles in turn are also through the furnace in a regular and convenient manner.

Heatin furnaces known as continuous pushing rnaces have been arranged horizontally or with the heating chamber inclined. In these furnaces the blooms or other metal pieces are pushed forward with a pusher in.the direction opposite'to that of the current of the products of combusbillets, or other metal pieces hereinafter tion, and owing to the arrangement of the blooms to be heated having to stand on the long wall of the chamber, only the upper or smaller portions of the billets are exposed to the products of combustion, mainly because they lie pressed-together on the floor of the furnace.

According to the present invention, the largest ossible contact is secured between the pro nets of combustion and the blooms,

referred to as billets, by arranging a nunr ber of billets horizontally in layers disposed one above another in the vertical heating chamber,-each layer of billets being arranged at right angles to its next layer so letters of reference refer to like parts in all figures of the drawings.

The heating chamber is composed of vertical walls A, and a domed top B, the burners for ejecting the gas into the chamber being marked C D is a door or opening for removing the billets. M is the pusher which is suitably operated hydraulically, on which the billets to be heated are arran d in horizontal layers. The first row of bil ets is placed on the said pusher with spaces reupper surface of this layer of billets coming against the under-surface'of the first layer, lifts the latter off the supports 8 s which are then removed, andtwo other supports t t arranged at right angles to the. first pair of supports are brought into engagement under the ends of the second layer of billets, thus supporting the two layers as the pusher M is lowered. A third layer can then be arranged on the pusher, which on raising and-lifting the first two layers in a manner similar to that before described, places the third layer in position, whilst advancing the previous layers a' further step upwards in the heating chamber.

In Fig. 3 of the drawings, three layers of billets are shown supported in position within the heating chamber by the supports t 15 while a fourth layer of billets is arranged on the pusher M ready to be lifted into the heating chamber,

Layers of billets are thus arranged first in one direction and then in a direction at right angles, and are lifted step by step in the heating chamber until the heating cham ber is completely filled, .as shown at'Fig. 1. p The uppermost layer of billets when opposite the door or opening D, can be removed by the operator bymeans, of a pair of tongs. Thereafter, with each lifting of the column of billets one stage by means of the pusher, the'operator can also remove the top layer of billets through the door or opening D. It will be observed that the billets' which have been" longest in the heating chamber are the ocality where the gases are being burnt, whilst the billets which have just been insert-ed into the heating chamber, are first heated by the products of combustion which latter already have travelled over the surfaces of the upper billets, and from which a great portion of the heat has been absor ed; consequentl the billets encounter greater heat ast ey progress upwards through the heating chamber.

It is owing to this lattiite-work arrangementof the billets that a great number of vertical channels are formed which allows of the billets to be introduced intothe furnace depends on the free section of the furnace. Beside this, it is possible. that the lower layer, on account of its resistance,

-may not support the column of billets fed into the heating chamber.

To meet the difiiculties, the invention .relates also to the modified form of construction hereinafter described with reference to Figs. 4 and 5 of the annexed drauings.

To pairs of supports at right angles to each other a a and b b can be introduced .-under the column of billets through two layers on the car. .being placed on the car, the pusher raises ,the car upwards into the heating chamber.

,pairs of channels at right angles to each other, respectively n n and m m. The billets are arran ed in horizontal The rst row of billets Two supports a a moving throu h two channels n n at right angles to the billets are brought under them, thereby supporting this first layer. The pusher with the car is then lowered and a second layer of billets is arranged on the car at right angles.to' the layer first arranged on the car and consequently in parallel relation to the supports a a. The pusher is then raised and the upper surface of this layer of billets coming against the under surface of the-first layer, I

lifts the latter off the supports a a which "are entering the two channels at n. The

i supports are then removed through these channels and two other supports 6 6 arranged at right angles to the. first pair of .80 Q In- Fig. 4' of the drawings, three layers of supports are introduced through the other pair-of channels m m under the second layer car, and so on.

sertion of the sai -means provided below the said carriage.

billets are shown supported in position within the heating chamber by the supports a a, while a fourth layer of billets is arranged on the car ready to be lifted into the heating chamber.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declarethatwhat I claim is:

1. A vertical heating furnace of the continuous type for heating by direct contact, for rolled half-products such as blooms or billets, or for similar metal pieces, comprising a vertical heating chamber, adapted to feed them into the heating chamber, means for supporting and lifting the billets, means for feeding the products of combustion from the upper end, and means for discharging such products from the lower end.

2. In a vertical heating furnace of the continuous type for heating by direct contact, for rolled half-products such as blooms or billets, or for similar metal pieces, as claimed in claim 1, means for introducing the layers of billets at the lower part of the heating chamber, said means comprising two pairs of supports disposed upon the bottom of the heating chamber and at right angles to each other, means for alternately withdrawing each pair of supports, and combined with said means a. vertical pusher.

3. In a vertical heating furnace of the continuous ty e for heating by direct contact, for rolledhalf-products such as blooms or billets, or forsimilar metal pieces, as claimed in claim 1, two pairs of movable supports-disposed upon the bottom of the heating chamber and at right angles to each supports, means fonmain'taining the other end of the supports and for controlling their alternate insertion and withdrawal, a loading carriage having therein two pairs of grooves at right an les for the alternate insupports, and lifting 'In testimony whereof I hereunto aflix my ERNST BOHLER,

other suitablefl recesses in the walls of the 1 furnace for the insertion of the ends of said 

